Apart from the Golden Temple, there are many other Sikh or Hindu temples in Amritsar. An interesting example is Mata Temple. In addition to the praying space there is a maze-like area, built to resemble various holy Hindu locations from India and Nepal. At some point visitors have to crawl or walk through water.
The Jallianwala Bagh is the site where in 1919 the British Indian Army massacred almost 1600 unarmed Indians, to send a strong message and deter against rebellion. One wall still bears the bullet marks.
En route from Amritsar to Lahore there is the Wagah border crossing point. Every evening takes place a border closing and flag lowering ceremony, a joint show organized by the Indian and Pakistani border agents.
The ceremony (filmed by someone else):